rename top level UX to convert_to_float8_training (#329)

Summary:
Pull Request resolved: #329

Old name: `swap_linear_with_float8_linear`
New name: `convert_to_float8_training`

Choosing a more generic name, with the following improvements from the
old name:
1. doesn't mention module swaps, which is an implementation detail
2. doesn't mention `Float8Linear`, which is an implementation detail
3. clarifies that this is for training, not to be confused with
   inference APIs
4. doesn't mention `linear`, which gives more freedom to add other
   modules later

```
find . -name '*.py' -print0 | xargs -0 sed -i 's/swap_linear_with_float8_linear/convert_to_float8_training/g'
```

Reviewed By: weifengpy

Differential Revision: D60195665

fbshipit-source-id: 8157b3d6f5db36c33370014135cbadfd192ac5b4

Author: vkuzo

README.md

@@ -36,7 +36,7 @@ This is the most accurate recipe as every tensor is scaled dynamically.
 
 ```python
 from float8_experimental.float8_linear_utils import (
-    swap_linear_with_float8_linear,
+    convert_to_float8_training,
 )
 from float8_experimental.fsdp_utils import precompute_float8_dynamic_scale_for_fsdp
 
@@ -55,7 +55,7 @@ def module_filter_fn(mod: torch.nn.Module, fqn: str):
     return True
 
 # convert all `torch.nn.Linear` modules to `Float8Linear`
-swap_linear_with_float8_linear(m, module_filter_fn=module_filter_fn)
+convert_to_float8_training(m, module_filter_fn=module_filter_fn)
 
 # optional: use FSDP
 model = FSDP(model, use_orig_params=True)
@@ -83,7 +83,7 @@ This is theoretically the most performant recipe as it minimizes memory reads.
 
 ```python
 from float8_experimental.float8_linear_utils import (
-    swap_linear_with_float8_linear,
+    convert_to_float8_training,
     sync_float8_amax_and_scale_history,
 )
 from float8_experimental.float8_linear import TensorScalingType
@@ -106,7 +106,7 @@ config = Float8LinearConfig(
 
 # convert all `torch.nn.Linear` modules to `Float8Linear`, specifying scaling
 # type
-swap_linear_with_float8_linear(
+convert_to_float8_training(
     m,
     config=config,
 )

benchmarks/bench_multi_gpu.py

@@ -20,7 +20,7 @@
     TensorScalingType,
 )
 from float8_experimental.float8_linear_utils import (
-    swap_linear_with_float8_linear,
+    convert_to_float8_training,
     sync_float8_amax_and_scale_history,
 )
 from torch.distributed.fsdp import FullyShardedDataParallel as FSDP
@@ -77,7 +77,7 @@ def get_model(K, N, is_fp8, base_dtype=torch.float32):
         modules.append(nn.ReLU())
     m = nn.Sequential(*modules)
     if is_fp8:
-        swap_linear_with_float8_linear(
+        convert_to_float8_training(
             m,
             config=config,
         )

benchmarks/profile_linear_float8.py

@@ -24,8 +24,8 @@
     TensorScalingType,
 )
 from float8_experimental.float8_linear_utils import (
+    convert_to_float8_training,
     linear_requires_sync,
-    swap_linear_with_float8_linear,
     sync_float8_amax_and_scale_history,
 )
 from torch.profiler import profile, ProfilerActivity, record_function
@@ -268,7 +268,7 @@ def main(
     m_ref = m_ref.to(device).to(ref_dtype)
 
     m_float8 = copy.deepcopy(m_ref)
-    swap_linear_with_float8_linear(m_float8, config=config)
+    convert_to_float8_training(m_float8, config=config)
 
     def ref_forw_backward(x):
         out = m_ref(x)

float8_experimental/__init__.py

@@ -10,7 +10,7 @@
     TensorScalingType,
 )
 from float8_experimental.float8_linear import Float8Linear
-from float8_experimental.float8_linear_utils import swap_linear_with_float8_linear
+from float8_experimental.float8_linear_utils import convert_to_float8_training
 from float8_experimental.float8_tensor import (
     Float8Tensor,
     GemmInputRole,
@@ -29,7 +29,7 @@
     "Float8LinearConfig",
     "Float8TensorCastConfig",
     # top level UX
-    "swap_linear_with_float8_linear",
+    "convert_to_float8_training",
     # TODO(future): remove Float8Tensor and Float8Linear from public API
     "Float8Tensor",
     "Float8Linear",

float8_experimental/float8_linear_utils.py

@@ -61,7 +61,7 @@ def swap_linear_layers(
     from_float_func: Callable[[nn.Linear], nn.Linear],
     *,
     module_filter_fn: Optional[Callable[[nn.Module, str], bool]] = None,
-) -> Optional[nn.Module]:
+) -> nn.Module:
     """
     Generic function to swap linear layers in a module with a new type of linear layer.
 
@@ -122,12 +122,12 @@ def post_order_traversal(
     return root_module
 
 
-def swap_linear_with_float8_linear(
+def convert_to_float8_training(
     module: nn.Module,
     *,
     module_filter_fn: Optional[Callable[[nn.Module, str], bool]] = None,
     config: Float8LinearConfig = None,
-) -> Optional[nn.Module]:
+) -> nn.Module:
     """
     Swaps `torch.nn.Linear` in `module` with `Float8Linear`.
 

float8_experimental/inference.py

@@ -215,7 +215,7 @@ def quantize_to_float8(
     *,
     module_filter_fn: Optional[Callable[[nn.Module, str], bool]] = None,
     use_fast_accum: bool = True,
-) -> Optional[nn.Module]:
+) -> nn.Module:
     """
     Converts torch.nn.Linear layers in the given module to Float8InferenceLinear.
 

test/test_base.py

@@ -23,8 +23,8 @@
 )
 from float8_experimental.float8_linear import Float8Linear
 from float8_experimental.float8_linear_utils import (
+    convert_to_float8_training,
     linear_requires_sync,
-    swap_linear_with_float8_linear,
     sync_float8_amax_and_scale_history,
 )
 from float8_experimental.float8_python_api import addmm_float8_unwrapped
@@ -604,7 +604,7 @@ def test_swap_root_linear(self):
         for emulate in [True, False]:
             module = nn.Linear(3, 3)
             config = Float8LinearConfig(emulate=emulate)
-            module = swap_linear_with_float8_linear(module, config=config)
+            module = convert_to_float8_training(module, config=config)
             self.assertIsInstance(module, Float8Linear)
             self.assertEqual(module.linear_mm_config.y.emulate, emulate)
             self.assertEqual(module.linear_mm_config.y.emulate, emulate)
@@ -618,7 +618,7 @@ def test_swap_root_linear_with_children_raises(self):
                 AssertionError,
                 "Does not support a root nn.Linear with children",
             ):
-                swap_linear_with_float8_linear(module, config=config)
+                convert_to_float8_training(module, config=config)
 
     def test_swap_submodule_linears(self):
         class MLP(nn.Module):
@@ -630,7 +630,7 @@ def __init__(self, dim: int):
         for emulate in [True, False]:
             model = nn.Sequential(MLP(3), nn.Linear(3, 3), MLP(3))
             config = Float8LinearConfig(emulate=emulate)
-            model = swap_linear_with_float8_linear(model, config=config)
+            model = convert_to_float8_training(model, config=config)
             self.assertIsInstance(model[0].lin1, Float8Linear)
             self.assertIsInstance(model[0].lin2, Float8Linear)
             self.assertIsInstance(model[1], Float8Linear)
@@ -658,7 +658,7 @@ def module_filter_fn(mod, fqn):
             )
 
         config = Float8LinearConfig(emulate=True)
-        model = swap_linear_with_float8_linear(
+        model = convert_to_float8_training(
             model,
             config=config,
             module_filter_fn=module_filter_fn,
@@ -687,7 +687,7 @@ def __init__(self, dim: int):
             "2.lin1",
         ]
         config = Float8LinearConfig(emulate=True)
-        model = swap_linear_with_float8_linear(
+        model = convert_to_float8_training(
             model,
             config=config,
             module_filter_fn=module_filter_fn,

test/test_compile.py

@@ -20,8 +20,8 @@
 )
 from float8_experimental.float8_linear import Float8Linear
 from float8_experimental.float8_linear_utils import (
+    convert_to_float8_training,
     get_float8_layers,
-    swap_linear_with_float8_linear,
     sync_float8_amax_and_scale_history,
 )
 from float8_experimental.float8_tensor import Float8Tensor, LinearMMConfig
@@ -280,7 +280,7 @@ def test_sync_amax_func():
             scaling_type=TensorScalingType.DELAYED
         ),
     )
-    float8_mod = swap_linear_with_float8_linear(
+    float8_mod = convert_to_float8_training(
         module,
         config=config,
     )
@@ -324,7 +324,7 @@ def test_sync_amax_func_cuda_graph_success():
                 scaling_type=TensorScalingType.DELAYED
             ),
         )
-        swap_linear_with_float8_linear(
+        convert_to_float8_training(
             my_module,
             config=config,
         )

test/test_dtensor.py

@@ -16,7 +16,7 @@
 from float8_experimental import Float8LinearConfig
 
 from float8_experimental.float8_dynamic_utils import NoopFwToFloat8E5M2Bw
-from float8_experimental.float8_linear_utils import swap_linear_with_float8_linear
+from float8_experimental.float8_linear_utils import convert_to_float8_training
 from float8_experimental.float8_tensor import (
     Float8Tensor,
     GemmInputRole,
@@ -187,12 +187,12 @@ def _test_fp8_mlp_tensor_parallelism_base(
     config = Float8LinearConfig(emulate=True)
 
     toy_model = ToyModel().to(device)
-    toy_model_fp8 = swap_linear_with_float8_linear(toy_model, config=config)
+    toy_model_fp8 = convert_to_float8_training(toy_model, config=config)
 
     tp_model = copy.deepcopy(toy_model)
-    tp_model = swap_linear_with_float8_linear(tp_model, config=config)
+    tp_model = convert_to_float8_training(tp_model, config=config)
     sp_model = copy.deepcopy(toy_model)
-    sp_model = swap_linear_with_float8_linear(sp_model, config=config)
+    sp_model = convert_to_float8_training(sp_model, config=config)
 
     # vanilla TP
     tp_model = parallelize_module(
@@ -223,7 +223,7 @@ def _test_fp8_mlp_tensor_parallelism_base(
 
     # PrepareFloat8ModuleInput with specific submodule fqn
     sp_model2 = copy.deepcopy(toy_model)
-    sp_model2 = swap_linear_with_float8_linear(sp_model2, config=config)
+    sp_model2 = convert_to_float8_training(sp_model2, config=config)
 
     sp_model2 = parallelize_module(
         sp_model2,

test/test_fsdp.py

@@ -27,8 +27,8 @@
     TensorScalingType,
 )
 from float8_experimental.float8_linear_utils import (
+    convert_to_float8_training,
     linear_requires_sync,
-    swap_linear_with_float8_linear,
     sync_float8_amax_and_scale_history,
 )
 from float8_experimental.float8_utils import compute_error
@@ -90,7 +90,7 @@ def fsdp_main(rank, world_size, args):
 
     # Note: we only iterate over `scaling_type_weight` because FSDP only interacts
     # with weights.
-    swap_linear_with_float8_linear(
+    convert_to_float8_training(
         model_fp8,
         config=config,
     )